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CurveFitter (Commons Math 3.2 API)
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org.apache.commons.math3.optimization.fitting</FONT>
<BR>
Class CurveFitter&lt;T extends <A HREF="../../../../../../org/apache/commons/math3/analysis/ParametricUnivariateFunction.html" title="interface in org.apache.commons.math3.analysis">ParametricUnivariateFunction</A>&gt;</H2>
<PRE>
<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
  <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.commons.math3.optimization.fitting.CurveFitter&lt;T&gt;</B>
</PRE>
<DL>
<DT><DT><B>Type Parameters:</B><DD><CODE>T</CODE> - Function to use for the fit.</DL>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/GaussianFitter.html" title="class in org.apache.commons.math3.optimization.fitting">GaussianFitter</A>, <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/HarmonicFitter.html" title="class in org.apache.commons.math3.optimization.fitting">HarmonicFitter</A>, <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/PolynomialFitter.html" title="class in org.apache.commons.math3.optimization.fitting">PolynomialFitter</A></DD>
</DL>
<HR>
<B>Deprecated.</B>&nbsp;<I>As of 3.1 (to be removed in 4.0).</I>
<P>
<DL>
<DT><PRE><FONT SIZE="-1"><A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</A>
</FONT>public class <B>CurveFitter&lt;T extends <A HREF="../../../../../../org/apache/commons/math3/analysis/ParametricUnivariateFunction.html" title="interface in org.apache.commons.math3.analysis">ParametricUnivariateFunction</A>&gt;</B><DT>extends <A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>

<P>
Fitter for parametric univariate real functions y = f(x).
 <br/>
 When a univariate real function y = f(x) does depend on some
 unknown parameters p<sub>0</sub>, p<sub>1</sub> ... p<sub>n-1</sub>,
 this class can be used to find these parameters. It does this
 by <em>fitting</em> the curve so it remains very close to a set of
 observed points (x<sub>0</sub>, y<sub>0</sub>), (x<sub>1</sub>,
 y<sub>1</sub>) ... (x<sub>k-1</sub>, y<sub>k-1</sub>). This fitting
 is done by finding the parameters values that minimizes the objective
 function &sum;(y<sub>i</sub>-f(x<sub>i</sub>))<sup>2</sup>. This is
 really a least squares problem.
<P>

<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>2.0</DD>
<DT><B>Version:</B></DT>
  <DD>$Id: CurveFitter.java 1422230 2012-12-15 12:11:13Z erans $</DD>
</DL>
<HR>

<P>

<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#CurveFitter(org.apache.commons.math3.optimization.DifferentiableMultivariateVectorOptimizer)">CurveFitter</A></B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/DifferentiableMultivariateVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">DifferentiableMultivariateVectorOptimizer</A>&nbsp;optimizer)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I>as of 3.1 replaced by <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#CurveFitter(org.apache.commons.math3.optimization.MultivariateDifferentiableVectorOptimizer)"><CODE>CurveFitter(MultivariateDifferentiableVectorOptimizer)</CODE></A></I></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#CurveFitter(org.apache.commons.math3.optimization.MultivariateDifferentiableVectorOptimizer)">CurveFitter</A></B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/MultivariateDifferentiableVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">MultivariateDifferentiableVectorOptimizer</A>&nbsp;optimizer)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Simple constructor.</TD>
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<!-- ========== METHOD SUMMARY =========== -->

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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double)">addObservedPoint</A></B>(double&nbsp;x,
                 double&nbsp;y)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Add an observed (x,y) point to the sample with unit weight.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double, double)">addObservedPoint</A></B>(double&nbsp;weight,
                 double&nbsp;x,
                 double&nbsp;y)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Add an observed weighted (x,y) point to the sample.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(org.apache.commons.math3.optimization.fitting.WeightedObservedPoint)">addObservedPoint</A></B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/WeightedObservedPoint.html" title="class in org.apache.commons.math3.optimization.fitting">WeightedObservedPoint</A>&nbsp;observed)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Add an observed weighted (x,y) point to the sample.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#clearObservations()">clearObservations</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Remove all observations.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;double[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#fit(int, T, double[])">fit</A></B>(int&nbsp;maxEval,
    <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html" title="type parameter in CurveFitter">T</A>&nbsp;f,
    double[]&nbsp;initialGuess)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Fit a curve.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;double[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#fit(T, double[])">fit</A></B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html" title="type parameter in CurveFitter">T</A>&nbsp;f,
    double[]&nbsp;initialGuess)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Fit a curve.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/WeightedObservedPoint.html" title="class in org.apache.commons.math3.optimization.fitting">WeightedObservedPoint</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#getObservations()">getObservations</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Get the observed points.</TD>
</TR>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://download.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
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&nbsp;
<P>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="CurveFitter(org.apache.commons.math3.optimization.DifferentiableMultivariateVectorOptimizer)"><!-- --></A><H3>
CurveFitter</H3>
<PRE>
public <B>CurveFitter</B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/DifferentiableMultivariateVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">DifferentiableMultivariateVectorOptimizer</A>&nbsp;optimizer)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>as of 3.1 replaced by <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#CurveFitter(org.apache.commons.math3.optimization.MultivariateDifferentiableVectorOptimizer)"><CODE>CurveFitter(MultivariateDifferentiableVectorOptimizer)</CODE></A></I>
<P>
<DD>Simple constructor.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>optimizer</CODE> - optimizer to use for the fitting</DL>
</DL>
<HR>

<A NAME="CurveFitter(org.apache.commons.math3.optimization.MultivariateDifferentiableVectorOptimizer)"><!-- --></A><H3>
CurveFitter</H3>
<PRE>
public <B>CurveFitter</B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/MultivariateDifferentiableVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">MultivariateDifferentiableVectorOptimizer</A>&nbsp;optimizer)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Simple constructor.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>optimizer</CODE> - optimizer to use for the fitting<DT><B>Since:</B></DT>
  <DD>3.1</DD>
</DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>

<A NAME="addObservedPoint(double, double)"><!-- --></A><H3>
addObservedPoint</H3>
<PRE>
public void <B>addObservedPoint</B>(double&nbsp;x,
                             double&nbsp;y)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Add an observed (x,y) point to the sample with unit weight.
 <p>Calling this method is equivalent to call
 <code>addObservedPoint(1.0, x, y)</code>.</p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - abscissa of the point<DD><CODE>y</CODE> - observed value of the point at x, after fitting we should
 have f(x) as close as possible to this value<DT><B>See Also:</B><DD><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double, double)"><CODE>addObservedPoint(double, double, double)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(org.apache.commons.math3.optimization.fitting.WeightedObservedPoint)"><CODE>addObservedPoint(WeightedObservedPoint)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#getObservations()"><CODE>getObservations()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="addObservedPoint(double, double, double)"><!-- --></A><H3>
addObservedPoint</H3>
<PRE>
public void <B>addObservedPoint</B>(double&nbsp;weight,
                             double&nbsp;x,
                             double&nbsp;y)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Add an observed weighted (x,y) point to the sample.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>weight</CODE> - weight of the observed point in the fit<DD><CODE>x</CODE> - abscissa of the point<DD><CODE>y</CODE> - observed value of the point at x, after fitting we should
 have f(x) as close as possible to this value<DT><B>See Also:</B><DD><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double)"><CODE>addObservedPoint(double, double)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(org.apache.commons.math3.optimization.fitting.WeightedObservedPoint)"><CODE>addObservedPoint(WeightedObservedPoint)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#getObservations()"><CODE>getObservations()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="addObservedPoint(org.apache.commons.math3.optimization.fitting.WeightedObservedPoint)"><!-- --></A><H3>
addObservedPoint</H3>
<PRE>
public void <B>addObservedPoint</B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/WeightedObservedPoint.html" title="class in org.apache.commons.math3.optimization.fitting">WeightedObservedPoint</A>&nbsp;observed)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Add an observed weighted (x,y) point to the sample.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>observed</CODE> - observed point to add<DT><B>See Also:</B><DD><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double)"><CODE>addObservedPoint(double, double)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double, double)"><CODE>addObservedPoint(double, double, double)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#getObservations()"><CODE>getObservations()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getObservations()"><!-- --></A><H3>
getObservations</H3>
<PRE>
public <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/WeightedObservedPoint.html" title="class in org.apache.commons.math3.optimization.fitting">WeightedObservedPoint</A>[] <B>getObservations</B>()</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Get the observed points.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>observed points<DT><B>See Also:</B><DD><A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double)"><CODE>addObservedPoint(double, double)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(double, double, double)"><CODE>addObservedPoint(double, double, double)</CODE></A>, 
<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(org.apache.commons.math3.optimization.fitting.WeightedObservedPoint)"><CODE>addObservedPoint(WeightedObservedPoint)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="clearObservations()"><!-- --></A><H3>
clearObservations</H3>
<PRE>
public void <B>clearObservations</B>()</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Remove all observations.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="fit(org.apache.commons.math3.analysis.ParametricUnivariateFunction,double[])"><!-- --></A><A NAME="fit(T, double[])"><!-- --></A><H3>
fit</H3>
<PRE>
public double[] <B>fit</B>(<A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html" title="type parameter in CurveFitter">T</A>&nbsp;f,
                    double[]&nbsp;initialGuess)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Fit a curve.
 This method compute the coefficients of the curve that best
 fit the sample of observed points previously given through calls
 to the <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(org.apache.commons.math3.optimization.fitting.WeightedObservedPoint)"><CODE>addObservedPoint</CODE></A> method.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>f</CODE> - parametric function to fit.<DD><CODE>initialGuess</CODE> - first guess of the function parameters.
<DT><B>Returns:</B><DD>the fitted parameters.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</A></CODE> - if the start point dimension is wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="fit(int,org.apache.commons.math3.analysis.ParametricUnivariateFunction,double[])"><!-- --></A><A NAME="fit(int, T, double[])"><!-- --></A><H3>
fit</H3>
<PRE>
public double[] <B>fit</B>(int&nbsp;maxEval,
                    <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html" title="type parameter in CurveFitter">T</A>&nbsp;f,
                    double[]&nbsp;initialGuess)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<DD>Fit a curve.
 This method compute the coefficients of the curve that best
 fit the sample of observed points previously given through calls
 to the <A HREF="../../../../../../org/apache/commons/math3/optimization/fitting/CurveFitter.html#addObservedPoint(org.apache.commons.math3.optimization.fitting.WeightedObservedPoint)"><CODE>addObservedPoint</CODE></A> method.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>f</CODE> - parametric function to fit.<DD><CODE>initialGuess</CODE> - first guess of the function parameters.<DD><CODE>maxEval</CODE> - Maximum number of function evaluations.
<DT><B>Returns:</B><DD>the fitted parameters.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../../../org/apache/commons/math3/exception/TooManyEvaluationsException.html" title="class in org.apache.commons.math3.exception">TooManyEvaluationsException</A></CODE> - if the number of allowed evaluations is exceeded.
<DD><CODE><A HREF="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</A></CODE> - if the start point dimension is wrong.<DT><B>Since:</B></DT>
  <DD>3.0</DD>
</DL>
</DD>
</DL>
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